一道英文化学题Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.

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一道英文化学题Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.
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一道英文化学题Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.
一道英文化学题
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.

一道英文化学题Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.
临界频率是 2.07×1014 的金属暴露到波长为5.24×10m目视可见光时,发出的电子的速度是多少?
物理题目俺不会做

波长太长，可见光的频率根本不能达到金属临界频率，不能激发出光子。所以没有速度！
光的频率=光速/光波长=3*10^8/52.4<2.07*10^14

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